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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 10, Iss. 8 — Aug. 1, 1993
  • pp: 1841–1848

Binocular enhancement of visual acuity

Ron Cagenello, Aries Arditi, and D. Lynn Halpern  »View Author Affiliations

JOSA A, Vol. 10, Issue 8, pp. 1841-1848 (1993)

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Using a computerized test system, we compared binocular and monocular visual optotype acuity, varying both contrast and contrast disparity between the two eyes. When contrast was the same in the two eyes, binocular acuity was better than best monocular acuity by an average of 0.045 log minimum angle of resolution, or 11%. When contrast differed in the two eyes, binocular acuity in most but not all cases was still better than the monocular acuity of the eye that received the higher contrast. This binocular advantage became smaller but remained significant as contrast disparity became larger. These results are most simply explained by threshold contrast summation of high-spatial-frequency letter components.

© 1993 Optical Society of America

Original Manuscript: July 10, 1992
Revised Manuscript: October 26, 1992
Manuscript Accepted: December 9, 1992
Published: August 1, 1993

Ron Cagenello, D. Lynn Halpern, and Aries Arditi, "Binocular enhancement of visual acuity," J. Opt. Soc. Am. A 10, 1841-1848 (1993)

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